Mystery Chevy 400 Dyno Tested - What's Inside This SBC?
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- Опубликовано: 1 окт 2024
- Nick's Garage Gear Shop
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Here's an unusual one for Nick's Garage... a freshly built performance SBC 400. Only thing is, Nick didn't build it, and he does not know what parts are inside. But now it's on the dyno, the truth will be told!
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Thank you for the great work you did on the engine Nick, i took the engine apart a few years ago and came to you to mesure the combustion chamber size because I myself had very few info on it. Based on those measurements I sold the old fuely heads that were maybe from an old 327 corvette engine and got a whole new top end kit. I will definitly choose every part myself on the next build , that being said im very greatful for how it turned out and very thankful for the good tune you did on her. Thanks again man ! Ps the engine is for my 89 firebird :)
Look at that awesome flat line of torque. It will be so much fun to drive that on the street. Part throttle double wheel peel burnout capabilities right there no problem. Rev limit it though. Rpm's are the only thing that will kill it.
Automatic or manual transmission?
@@SavageEuge manual 5 speed
hell yea i am building a 89 formula myself right now
@@juicedchevy "manual 5 speed" EXCELLENT
I went with 400 GM and added a stroked kit to make 427 and built it all to run pump gas.. Dyno run was 535 hp with a 850 Holley . Added EFI and the horsepower went to 565 hp. EFI improved the overall driving experience and added a big boost in power. This is odd combination of big power in a small package
The carb should've added more HP if it was tuned right
I don't care if it's Chrysler Ford or Chevy they're all American horsepower. Thank you for another great video
Right on!
Don't forget about the 2 million Toyotas built in the USA!
Holden 308
@@theupscriber65 Toyotas don't count in our book (us old timers).
@@theupscriber65 Said NO ONE EVER
You know Nick is a gearhead through and through!! He still gets excited when he makes a decision and confirms it by rubbing his hands together. Sign of someone that loves what he does!! :)
You can see and hear he just loves doing this!
Absolutely
He’s like a 👍🏻kid in a ❤️candy store, when he 😍sees 🥰classic❤️ muscle cars.
I think Nick is falling in love with those Chevys. Really enjoy the variety of engines.
He's amazed by Chevy power... 375 HP from 327" stock...
Mopar small blocks normally had higher torque out of the factory per cubic inch as I remember, but Chevys, you could get more horsepower out of aftermarket and were really inexpensive to build. I'm hearing here about 400 over heating, but that must be a rare problem because I've never had that happen. Those 400s you can really get some good power out of if ya do it right. You can easily max the 202 valve heads out and need more cfm. A turbo can get you past that, but I found dart heads of the day got me past that restriction, and the the 400 allows just a little more room for bigger valves too. Ahhh the good ol days...
Why not rev it to at least 6500? I have made 100s of passes on a small block 400 with stock crank and rods,I’d turn it 7k in the water box and it lived a good life but eventually stock balancer gave up at the 330 mark and slung rods lol running 6.40s that was when it was fun!
Super super quick et, how many horses was that 1800 ?
@@marcalampi5036 lol noooooo I was running 1/8 mile probably at that time I would guess 450-500
I built a 400 it never ran hot and slung belts and planetaries out at 7200. Stock bottom just polished and balance
@@sirtnfol8476 they will hold up our downfall in the beginning was the stock 30 year old balancer one of the best days at the track we were going rounds car was running dead on + only 1-2 numbers and 00 lights every pass very hard to beat a car that runs the number with double 0 lights every pass pulled in the water box and the balancer wasn’t balancing well enough lol and developed a slight leak I argued with the track guy to send me on but I guess he didn’t want to clean up the track lol buy the time I got back to the trailer the crank had beat the seal completely out of the timing cover so if I would have made the pass I would have ended badly in multiple ways possibly the next time it went to the track after some chassis and engine upgrades it ran a 5.80 off the trailer NA no power adders ever on the car and it is still running in the 70s to this day and is for sale at a great deal less than 10 passes on engine and a lot of new nice parts also have 24ft enclosed trailer
Thanks Nick for a great video!
I remember buying 400 sbc's for $50-$100 in the late 80's/early 90's. People around here were scared of them because of all the stories of over heating or blocks splitting. They didn't understand about drilling the steamer holes in non-400 cylinder heads. So they built stroker motors instead. I love these engines! So easy to make good power and torque. I wish I had one now!
Drilled heads or not these things heated under load. I went as far as using a 4 core desert radiator used in the Blazer. Everybody I knew had the same problem . Not a summer time driver. I know what I'm talking about. I am a two time NHRA record holder even John Bandimere is familiar with this problem. (He is an old and dear friend.).
@@genefoster8601 I ran one in my Nova for years. Std. bore 400sbc, 461 double hump heads, 305 comp cam, tunnel ram w/450 Holleys. TH350 w/3500 stall, 4;56 gears in a 10 bolt. I used a 4row radiator, Robert Shaw 160 degree thermostat, good water pump, flex fan with a shroud. Car would run between 165-185 in traffic in July/August. Never had an issue.
Out of the dozen or so that I had, I never went more than .030 over. Most were std. bore. I never had any overheating issues. Maybe I was just lucky.
@@mcdonaldm73 you may be right. I live in here in Denver,Colorado and we start a 5280 feet above sea level where there is a lack of oxygen and running up to the Eisenhower tunnel and vail pass the El Camino under that load would reach 240 degrees but with the 18 pound radiator cap it wouldn't boil over. Again now we're talking at around and over 9000 feet. When going downhill it would go immediately back down to 180 degrees even though it had a 160 degree thermostat in it. A few other people I knew had the same problem with the 400 small block. The stock engine gave no problems with heat as long as you didn't raise the compression. Once you went to the double hump heads or the aluminum 202 heads which I ran you were in trouble. I think the altitude here and the mountain driving had a lot to do with this phenomenon. I just didn't like living on the edge of my seat with this engine. Finally put a big block LS engine in it.
@@genefoster8601 your right that's why I built a small block 350 16.5 to 1 compression rto 675/326 full roller motor 5500 to 6000 stall 400 turbo transmission naturally aspirated single carb. Never had a over heating issue.
I had a mild 406 in a chevy II that ran 11.70s on 91 octane. Cast iron Pro Action heads with 200cc intake runners. Raced it and hot rodded the crap out if that 2 bolt main cast crank 400 and never overheated it. So wierd to hear about the horror stories....
I always remember, when draining small amounts of oil out of an overfilled case, loosening the plug to the "finger-loose" point, and then shoving a very short 3/4" I.D. heater hose (or somewhere abouts) over the flats of the plug and slowly turning it at "precision drain mode" by holding the hose without burning my fingers on 200° dripping oil and plug.
Excellent tip!
I love that tip! Thanks for that, always more to learn no matter how long you're in the game.
Fumoto drain valves make it easy! I use them on oil and tranny pans.
Just finished my 400. .490 lift. Blue print Aluminum heads. 6" rods. Thing HAULS!! 400 is my all time favorite engine.
If you want to restrict yourself to only 400 cubes I guess it's fine for you
@@lollipop84858 Not going big block. Staying with stock block. So yeah. 400 cubes it is.
@@cw1824 ...until you get some spare cash, get itchy...and break out the grinder so you can stroke it to 4 inches...and 440 cubes...LOL!
@@DMWatson-qc6mz I build engines for a living. It's tough not to spend my whole paycheck on engines lol
What’s up Nick and George how are you doing up in the north. It’s cool to see a GM on the channel🤘 today I will be dropping a video reviving my newest acquisition A 1970 Buick powered by a 455. There’s so many great engines out there from different brands it’s hard to be brand loyal lol
Morning B! You are right about the variety of great engines out there. Gotta love them all.
you could not revive a wheel borrow yours is the worst channel on you tube really you just dont seem to learn there are all these channels with people who know what there doing and you still dont pick it up and do things wrong
if its got wheels and drinks gas,im in
Im doing the same thing. 91 buick wagon is getting an olds 455
My dad used to build late model dirt car engines using 400 sbc as starting point by time he was done he had 700hp+ fire breathing monsters that would run 100 lap races wide open. I grew up getting to watch this and hand him wrenches and be a part of it. Nasty nasty engines especially for the time.
You know your Monday gonna be good when start with nicks garage
Thank you, Nathan.
tru dat bruh
Nick's attention to detail is the secret to his success, good show Nick
I used to build and run a few 400's back in the mid/late 80's on the street. They had killer torque for a small block and were great street engines. I also used to run them with the old "double hump" fuelie heads.
@Louis Edwards Yeah, I've seen a few sets here and there on Marketplace but you're right, not as many as years ago. Most people laugh at them now but back in the day, they were a great head to use.
@Louis Edwards Theres no point in trying to find them these days, unless you need them for a correct resto. Aftermarket heads are so cheap for an SBC these days that those old things aren't worth the time, money, and effort anymore. Hell, even a little work into a dime a dozen Vortec head and you'd be better off. Fugget-a-bot those ancient double humpers... Not worth it.
@Louis Edwards They can still be found, it's just not worth it anymore. It was worth it back in the day.
@Louis Edwards
I hear ya. Same here. Mechanic all my life. Built all my own engines and for buddy’s and @ work. Same with my transmissions, rear ends and every part on the car actually. Started building transmissions at 19 years old and I built my last one two years ago for my Brother. I have now retired from building transmissions. It kills my back to even do too much of anything anymore.
those are the heads i run on my SB400 and i hand port matched and polished everything inside them. match intake runners as well.
👍SBC 400... 1 great engine
I had one I put in my old Buick, good motor, the 1970-1972 were four bolt mains.
307ci, 327,sbc 400 .Are they not factory stokers ?
Lol my buddy had a 400 in his 68 Camaro graduation gift in 1996, gm dual plane holley 750 , ported camel humps headers and a mystery cam , he blew the doors off almost everything , made believers out of us 400 is a brute
I love my 400sbc!
Nick, thanks for the Bowtie addition.
Ya know it's gonna be a good day when it starts out with hot coffee and Nick's Garage! First, I want to commend George on his superb skills. If I was there, I wouldn't get to see the angles or hear the sounds any better! For example : the shot of Nick when he hit his numbers! Rocky, eat your heart out! And Nick, your mind is something to watch work! A machine "reading" a machine....
Great job fellas, as always! Stay safe and healthy!
Nice, long torque band. That sweet little engine is a stump puller in disguise.
That's a 400
Had a 400 in my 78 GMC Camper Special. On the way home in 84 it died in the freeway right at an exit, no spark. Coasted as far as we could and we stopped right beside a pay phone. Called BCAA for a tow to the GM dealership that happened to be open until 9pm, we arrived at 8:35. Bought a pickup coil on an educated guess and after listening to the disbelief and hearing about the nearby accommodation pulled the distributor and got to work. I had it back together and was about to test it as the dealership staff were walking out at 9:02. It fired up and I was going to set the timing but instead drove out of sight first. The disbelief from the staff probably saved us half an hour. Never left home without a spare HEI again. It's almost as if you can prevent a failure just by having the spares on hand. and I packed a bunch of them and although I never needed them for my own vehicles I did get to help plenty of people who were in the middle of having a bad day.
Cheers.
With good fuel it will like 42 degrees of advance total
I think that the 750 carb is to small, and that it is starving.
Lol, I remember in the 70s you couldn't give us a 400ci Chevy for free. We would turn our back on it. Maybe use it for a truck or something. Live and learn.
Most factory ones where 2 barrel, small valve head, low compression boat anchors. Performance parts are cheap now though.
Why would you turn your back on 50 more cubes and a 4 bolt main?
@@BigHatsince98 Most weren't 4 bolt mains and the heads flowed way less than 350 heads so way less power. Now that heads and pistons are cheap, it would be a different story.
@@BigHatsince98 Because back then the 2 bolt main motors were cheaper to work on with more available options and higher possible output.
@@bradcoffman7395 So why not swap the heads with whatever heads you wanted? There were double humps, 283 power packed, whatever else you wanted, machine shops have been putting 3 angle valve jobs in heads for a long time as well as porting and flowing. There were options. A 4BBL intake isn't rocket science to install either. They were also made into 377's. Also, how is a 2 bolt main going to have a higher possible output than a 4? Are you talking about adding splayed mains?
Love spending my coffee time watching your dyno Nick! have a great week buddy.
Thanks! You too!
i had a 67 malibu w/ a '73 high nickel 400 small block that was around 400 hp, great gas milage ... around 18 mpg
If you build them with 5.7 or 6.0 inch rods and put big nice flowing heads on them the 400 sbc is amazing. Best bang for your buck for any engine in my opinion.
I built my 406ci with 5.7 rods ,-12cc dish 4VR speed pro,and Promaxx 200cc aluminum 64cc heads …for a 10:1cr ,motor is a beast in my 86 squarebody
this is the good stuff dr. nick. cant get enough. and we thank the fella for the 400ci donation. that finger pointing does the trick,,
That 400 small block I put out more horsepower than any stock 440
Not true. The 440 6 bbl was rated at 390hp but actually over 400 hp.
When I was a kid, my dad had a '77 suburban with a 400 small block with no smog equipment and it was a strong engine.
I grew up on GM big blocks mostly Olds. I to this day would still take torque over HP on the street. It's just more fun.
I've seen some sketchy things on this channel. But to have a sbc make that number and at that rpm is a massive sign it's not a good combo. 12.5 vacuum and only 411 hp? 406. It's no more then a RV cam if that's all it's pulling for air.
Sketchy things ? Is in what I'm curious actually not being a smart ass I may agree w you never know so hmu
LoL I love his smile as the engine starts up...despite his lifelong experience he still get's a childlike thrill out of the sound of the engine starting up. he's adorable.
I always start my Monday's with a cup of coffee and Nick's Garage. Have a great weeks guy's! Bill from Linglestown Pennsylvania
Thanks Bill! You too!
Another amazing video Nick! You pulled every bit out of it! Smooth torque curve. Let's hope the owner has a stout drive line.
That is one sweet, sweet small block Chevy 400 engine.
I had one in a '73 Firebird that ROCKED. That motor made power all up and down the RPM's, not like some of the smaller SB chev motors that were really peaky and didnt make much below 3500 or 4k
The torque curve looks like a 100 mile stretch of Kansas interstate.
The missing bolt, if a stock fuel pump and push rod are used, too long a bolt will bind up on the fuel pump pushrod.
@@B4TS1 true
And it would do very well properly geared with the right car on that 100 mile stretch of Kansas interstate. I would call it Bandit.
@@B4TS1 that bolt hole is there to hold the pushrod when replacing the fuel pump. your not supposed to have a bolt in the block when running
@@B4TS1 I thought that the hole to hold the pump push rod was on the front, plugged with a short bolt?
The little sbc 400 is very underrated and nowadays very hard to find. They were the true Chevy sb performance engine! I built one back in the early 90's for a 73 nova. Put the edelbrock rpm package on it and ran 12 o's at 127mph in the 1/4 mile. All with the short rods. I still own 3 rare early ones today! Bad little engines. A friend built one with exspensive parts with Brodix, spreadport heads and ran 10:50's in an s-10 pickup. Pretty stout they are.
Good engine here in australia in late 90s b4 the ls1 2 3 engines went crazy
Mate put one in Mazda rx4 run 9.56 quarter
@@stevesalkas9128 that's a lot of work,time and very expensive! I've ran 7:50's in my nova with a monster big block tho before. Pretty much know what works and what doesn't. I don't really run the 1/4 anymore, I do street race for cash tho!🤪😁
My dad use to have a 77 gmc that he would mud bog and he always ran 400s with 750 dual pumper always was a stout engine to keep his tires spinning
Nick, the more I watch you, it becomes apparent that you mentally bond with an engine when it's on your dyno! Knowing how to coax the maximum output from a particular engine is gift only attained through years of experience. Great vid Nick! 👍
Nick is an engine whisperer👍👍
i got a 400 and an old school 350 large journal one problem the 400 is in a 79 4x4 chevy short box cheyenne full option truck with under 35,000 miles on it . the truck is in mint condition parked in a shop its hole life . i got for free for taking 4 other rigs in the shop and all the engines and car parts and 15 pu parked out side one car is supper rare a 67 rs ss 427 yenko camaro the other one was a 68 ss 396 and 2 79 z28 camaros got all the matching # engines , then i got 2 454 strokers a fresh 327 4 bolt built and about 4 350 4 bolts all run good , one of the 454 is built with a tunnel ram both stated out as the 450 hp 485 torque ho 454 with the 4 inch stroke steel crank heavy rods heavy pushrods 10.5 to 1 compression crate engines
I love watching Nick when he's in the Dyno room. That is where Nick has his most fun. He can tune like crazy in there. He has super good instincts. He tunes by feel. Old skool. I like that.
Hopefully the heads have the cooling holes between the cylinders that are required for 400ci small blocks.
Yeah they don't like to be run hot at all without some mods to the water jackets
The Edelbrocks do...
I really enjoy seeing a tuning guru at work. This is the first and only time I've ever subscribed to any RUclips shows. It Nick can't squeeze out a few more horses I don't know who could!
Nick I Love the channel Brother.
Wish we had a Nick here in Kentucky, USA. You'd be building me a 400sb for my 82
My favorite Chevy sb. Had a built 400 back in the day. Torque monsters.
411.2 Holley 650 12.7-12.8 36-37 degrees good enough for me 327.5 600 Holley don't know if front 80 rear 90 Hot rod magazine 360 +.030 no AFR 600 Holley drill bit or 90 jets Summit says no drill bit rear metering block holes? Or only front metering block $75
I have a mystery 400 in my 62 Impala SS, I wish I had a guy like you near me but I'm in England
High Nick ! Have U Ever B' Intercepted by 2 F-15 american Eagle's in Canuck Airspace ! Life is Good ! YYZ Rock-Crush'in Ratman . The Need 4 Speed ! Go FAST or Go Home ...
Having some trouble with the distributor clamp. Looks like it's bottoming out on the intake boss and not applying enough force to the distributot collar. I had this happen with a 383 of mine with a cheap chrome hold down. Timing would always change on me. Replaced with an oe steel hold down. Problem solved.
Nick's Garage Steve Morris engines well 318 +.030 1.96 Int 1.60 exh G street Machine Glasgow Montana
600 Holley stock out of box
1850-3 needs 80 front 90 rear power valve accelerator pump 4 corner adjustment
Impressive. I'd like to see that go down the track in a 4-spd '70 Nova with 3:42 or 3:73 gears. You could have serious fun and actually drive it home afterwards.
Actually my cousin Danny had a 400 straight out of a big azz caprice. Lunati Cam and Holley 500 2bbl , headers. Th350. 3:73s n50x14 M&H street tires .
That was it .
Thing was tough to handle when you laid into it . Burnout after burnout. Stepped down to 3.08s . Killer combo.
I have an original Chevy small block 400 from my 70 Chevy Monte. The 1st year built was 1970 into the mid 70's. Don't like the heads as they came with steam holes. Not a fan. But, with mods and upgrades, easy 475 HP.
I have a 400 sbc in my 71 chevelle numbers matching, I would love to get 500 hp
Thx nick 👍🏻
Somebody left the furnace turned on Chevy 400 510 HP 530 TQ 93 pump 500 HP Ellweins 1st gen nobody wants to buy E85 4 times a week 87 regular burns clean last longer better gas
Great show learned some things about the Chevy that I didn’t know
I Had two cars with that motor. A 75 monty carlo. And 76 caprice estate wagon. They are excellent motors they both lasted over.500000 miles
Never underestimate a mouse ,he can scare the heck out of an elephant once in a while. Turn that chevy up to 6500rpm ! Let her eat!
Looked to be all done by 5200... seemed a little low... maybe dished pistons, thick head gasket, 72cc heads, 1.5 rockers? Needed a lot of timing for those heads...
@Car Guy daddyo - Doesn't say Eddy on end of heads... maybe Chevy L98 heads or who knows what brand or size of Asian heads?
Eddy has 4 or 5 series of heads: Performer, Performer RPM, Victor, E-street, CNC, etc...
@Car Guy daddyo Yes and some cast heads are better flowing.
@@BuzzLOLOL 409 hp and 415+ torque is more than enough for any street application. Put that 400 in a Nova or a Camaro, and it'll humiliate just about anything that goes up against it.
@@BuzzLOLOL youre right it has deep dish pistons and 1.5 rockers but it has 64cc chambers
Dodge 440 dyno test ignition module's 35-38 degrees blow by fail but top HP / Torque
A street engine with a single plane intake manifold , ? Maybe a dual plane intake would help the low vacuum at idle ? Had a Chevy Caprice sedan that had a 400 .
it aint a single plane,were did you get that idea?
i thought the Big Block" was Chevy's........."Mystery Motor." hahahaha
What a watch! It's always a lot of fun to watch a dyno pull! Maybe we'll be able to toss the 455 Rocket Olds on the dyno.. that would be a treat!
Back in the day, 1973, I had a 1967 Camaro with a 400 in it. It was built up almost exactly as this. I always wondered what kind of horsepower it was putting out.
I knew a guy who had one in a chevy truck, and it was fiesty.. I think chevy used the 400 to get the 409 also that was in some of the old monte carlos.
Greetings from Sydney Australia Nick..love your show ✌
Awesome! Thank you!
Those valve covers look fantastic, they really give the motor a great look!
Hi Nick interested In seeing what this 400 does on the dyno as we have a 355 sbc for our car
Well I'm not trying to be an ass but there should be a vacuum line from the carb to the valve cover this probably were your losing your vacuum stick to dodge
Good morning Nick, the sounds of HP in the morning, what a great way to start a Monday.
Good morning!
@Car Guy daddyo Good morning Car Guy, Nick told me about how you ordered the water pump for your car, and wound up with two water pumps. If you say it's good, I will trust your judgement. When I had the Charger down here in Texas in the early 70's, it never overheated with the stock setup. Now there is way more traffic, and it is hotter than it was before. I'm sure that the mods that Nick did to my original radiator, and the addition of the aluminum water pump housing, along with the new water pump from FlowKooler will keep the Charger running nice and cool during the Texas summer. I appreciate you letting me know about them. I'm sure that I will be happy with the results.
@Car Guy daddyo Actually, I believe that my Charger had the smaller radiator in it from the factory, and not the 26 inch which would have been indicated on the fender tag. Nick kept my original radiator, and had an extra row added to help with the cooling. You are right on the money, as usual, with your knowledge about cooling, and I always ran a 180 Thermostat in the Charger. I probably won't be driving it much during the heat of the day, because with no a/c it would be brutal inside the car. I'll be doing most of my driving early morning, and late in the evening after it starts to cool down.
@Car Guy daddyo Coming from you, I take that as a highly respected compliment. I put a lot of thought in over the years on how I wanted to build the Charger. I'm glad that you agree with the way I'm building the car. The Charger is going to have Magnum 500 Wheels, with original center caps, 15 X 7 up front, 15 X 8 in the rear, with redline tires just like it had when new.
@Car Guy daddyo I was going to go with the day 2 look, but decided to keep it stock looking on the outside. There are 15 X10 Magnum 500 wheels available for my drag radials.
411hp/447tq with a 650 on a 406, while the smaller 1971 LT1 350 was 370hp/380tq came stock with a 780 on it. could it be that the 71 LT1 could have did better with a 650?
my friend built a 406 Chevy, man would it launch like a monster. he didn't race it only a few times, after 15 years he sold the car, a 79 Camino. the guy that bought it beat it well and blew a rod out the side of it.
thanks Nick!!
I’ve got a 406 in my 57 Nomad. It is a heavy car. I built mine for torque instead of horsepower. Brodix aluminum heads, small hydraulic roller cam with 1.7 roller rockers and an Accel super ram fuel injection. 376 horsepower at the crank but 515 pound feet of torque at 2,300 rpm. It is loads of fun to drive!
If I remember correctly Pontiac also had a small block 400 and a big block 400 which we had in a 73 I believe Bonneville
From the late 60's thru to the mid 80's all Pontiac V8 engines were physically the same size from the outside. The bore size and stroke of the crank made the difference in cubic inch displacement. The engine size was usually cast in the outside of the block also.
My 1973 Caprice had a small block 400.
Nooooooo not a Chevy ok just once lol,. M.o.p.a.r....... massively over powered and respected
I’ve had a 400 SBC and they can handle more cam and carb/cfm’s than a 350 SBC.
Bon Matin/ Good morning, nice to hear a little chevy on the dyno. Thank-you.
Morning! Glad you could join us.
Nice guy like Nick taking care of all those little details the other shop didn't
400 is better 350 but you want crazy performance we need to change everything in
Liking it, ✋🏻
Nice job enjoyed you channel on the small block 400. I have a big block 71 Nova
Yes. the Gen I SBC has been put in just about anything you can name. I have a 406 SBC in my Datsun 240Z
Datsun 240Z with a V8, nice.
savage
Nick I read that too much oil can also collect in the valley, and heat the bottom of the intake, robbing HP.
Hey Nick, one day we will have to get a hemi 6 on the dyno haha.
@nick'sGarage biggest chevy secret of 700HP with 95% stock parts= find a desiel motor military Jimmy ( 80's ) 6.2 motor and convert it to gas. Literally change the pistons , pull out the glow plugs put in spark plugs and pull out the timing on the intake and put in a hei distributor. 95% bullet proof stock gm parts and you've got the world's cheapest 95% stock 700HP motor.
Hey Nick and Guys! 400 sb Chevy has been my favorite stock street motor to run on the street! So much torque! 👍
Til the block cracks between the cylinders... I had this happen twice, and then I gave up on the SBC 400's.
A 400ci sbc, with aluminum heads and a decent cam and intake should hit the 500hp mark easily!? Its not hard to hit 500hp with a 383ci let alone a 406ci.
That is exactly what I was thinking, I was expecting 500hp too. The heads look like edlebrook RPM heads. They are not that big, intake runners are only 170s. They work killer on 327-350s but don’t have enough volume for a 400. I think that’s the problem.
Good morning, Nick, George, and everyone!!! Nick, it’s ALWAYS a pleasure watching you applying your skills and knowledge to all these engines and getting them to perform as they should. A TRUE engine guru: KUDOS, Nick, and y’all have a fantastic day!!! 🙂
Thanks for that!
We are making 400hp with a old holden 308 mild hq heads this thing just makes 400 and its a 406 good old gmh 308
That's a nice sounding Chevy, and what a beautiful flat torque curve. I am surprised the 1/2 liter oil overfill actually lost 4 hp? This engine should be very responsive and make good power from 2500 RPM. I noticed the distributor had a vacuum advance. I don't know if it was connected during the dyno test (assuming it wasn't) however, the vacuum pull at idle should be enough vacuum at 800 RPM. I think this would be ok for auto trans (1000 RPM for manual) and good for power brakes. I enjoyed this video and also your many others.
Nick is the best but I think he missed a few hp from a few degrees more timing… you never know
Great fun to sit and watch you enjoy yourself a LOT!,,squeezing out every possible horsepower! Way to Go Nick! ;)
good messege to all the big Carb lovers ... big is not always better ,,, hahaha
I remember my dad had a fully loaded 72 Chevy Impala with a 400 in it, that thing ran great until the day he sold it with 200,000 Mi on it. I was just starting to learn how to drive back then and drove that beast LOL
Don't spin it past 6000 the cast crank and rods will not stay together
Guessing 375? Very impressed with this truck engine. I love it also when they scream… 409.9.
We shall see!
375? Its pretty hard to not make more than that with a SBC 400.
You never did tell us what's inside this SBC. No cam specs, what heads are they running? Have the heads been ported at all? Is it an out of the box dual-plane intake? Does it have a windage tray? Dyno numbers are a fun dessert, but what it took to get there is the meat & potatoes!
I wish there was a laugh react to your comment. He said someone else built it and he got no spec sheet with it. He's just testing and tuning.
Kick this is the best Car & Engines stuff on youtube....No kidding it is that good....Thanks again...!
Hey Nick 175 180 what was the compression ratio for those of us who don't have a gauge to look at or know that
Damn good video Nick! I learn something new almost every time. I like watching you work on the bow ties.
Nicks just like a surgeon slapping that carb on
The missing bolt, if a stock fuel pump and push rod are used, too long a bolt will bind up on the fuel pump pushrod.